Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcea0e764d6b1f13…

MALICIOUS

PDF

80.1 KB Created: 2021-06-26 04:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 61d00ff2df3f734ba2d736a257a3b785 SHA-1: bbad7451b902c198e3bbb48398bf4b7b90c8b667 SHA-256: bcea0e764d6b1f135d542946a0115d5f5117a1fbd6192c39be9908ddd784d858
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to host malicious content or redirect users. The presence of numerous unknown URLs further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/120f136ae8c1736f2fd46be5a0c071af/dazikodojexasigidoxez.pdf In PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-15/20210515053235276818.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/58426348069.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0c6fc7a324640af6c7eccbf526f3a27b/99754276310.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/pajonukomubudabegebu.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/nivuregije.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082786ceebb9---xekimi.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/14617964534.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/8b868f774c4590a7da4ba1b68980bdfd/24772772708.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/6be415440117ec0860fff4ff0440caf9/87235103507.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/savawol.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddb20c7d95---15489614446.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d712ed50d---92367343122.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/46026589118.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/556d6db328d9aeebb08b47549d65f881/gogiwovirotifufo.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/99532319285.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/df79dfbb83fbd09668448e1446a233f7/26914856922.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/2ad5f3f5e6e4dbb18f9b7b5497dfc9f0/sejisibafudexase.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40690b5ec0---79483562686.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/bexixuninizejezakijaz.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051612052873499.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/a0c1df93b2aaafaead995c65a287b112/94547648417.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097fd3b2f7b5---97346521855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=deferred+tax+examplePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 16292 bytes
SHA-256: 0179bcf52ab5267056070c5f777501c02bfee014d2f6f6a0a2cdb513cceb1562
font_01_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 10276 bytes
SHA-256: 1a7c3cebc8963cdf6c1d234425c6017b62bade6bb25af646c46c5800bf6d9d42

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